The chance of earthquake damage in Mount Vernon is about the same as South Dakota average and is much lower than the national average. The risk of tornado damage in Mount Vernon is higher than South Dakota average and is higher than the national average.

The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.

The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.

The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.

Other Weather Extremes Events

A total of 2,378 other weather extremes events within 50 miles of Mount Vernon, SD were recorded from 1950 to 2010. The following is a break down of these events:

Type

Count

Type

Count

Type

Count

Type

Count

Type

Count

Avalanche:

0

Blizzard:

16

Cold:

2

Dense Fog:

0

Drought:

0

Dust Storm:

0

Flood:

145

Hail:

1,260

Heat:

1

Heavy Snow:

13

High Surf:

0

Hurricane:

0

Ice Storm:

0

Landslide:

0

Strong Wind:

35

Thunderstorm Winds:

836

Tropical Storm:

0

Wildfire:

1

Winter Storm:

28

Winter Weather:

0

Other:

41

Volcanos Nearby

No volcano is found in or near Mount Vernon, SD.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Mount Vernon, SD.

No historical earthquake events found in or near Mount Vernon, SD.

Historical Tornado Events

A total of 56 historical tornado events that had recorded magnitude of 2 or above found in or near Mount Vernon, SD.

Distance (miles)

Date

Magnitude

Start Lat/Log

End Lat/Log

Length

Width

Fatalities

Injuries

Property Damage

Crop Damage

Affected County

2.2

2003-06-24

2

43°42'N / 98°14'W

43°47'N / 98°15'W

6.00 Miles

400 Yards

0

0

500K

0

Davison

Brief Description: A tornado damaged crops, trees, and numerous buildings on several farms. On one farm the northeast corner of a home was heavily damaged, and several buildings including a barn, a grainery, and a machine shed were destroyed. Large trees were blown down.

6.4

1992-06-16

2

43°43'N / 98°09'W

43°50'N / 98°11'W

3.00 Miles

73 Yards

0

0

3K

0

Davison

6.4

1992-06-16

2

43°43'N / 98°09'W

43°50'N / 98°11'W

3.00 Miles

73 Yards

0

0

3K

0

Davison

8.6

2007-05-05

3

43°40'N / 98°25'W

43°44'N / 98°27'W

4.00 Miles

200 Yards

0

0

300K

0K

Aurora

Brief Description: EVENT NARRATIVE: A tornado destroyed a hunting lodge and nearby outbuildings. The tornado also severely damaged a house, tossed a trailer 100 yards, and caused tree damage. EPISODE NARRATIVE: Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

10.5

1962-05-21

3

43°43'N / 98°03'W

1.00 Mile

167 Yards

0

32

2.5M

0

Davison

13.0

1962-04-26

2

43°43'N / 98°00'W

0

0

25K

0

Davison

14.8

1978-06-24

2

43°54'N / 98°07'W

0

0

0K

0

Sanborn

16.0

1962-05-21

2

44°01'N / 98°17'W

43°52'N / 98°20'W

10.40 Miles

33 Yards

0

0

0K

0

Sanborn

16.7

1954-05-27

2

43°30'N / 98°06'W

1.00 Mile

137 Yards

0

1

25K

0

Davison

18.3

1962-05-14

3

43°24'N / 98°23'W

43°30'N / 98°14'W

9.70 Miles

1760 Yards

0

0

0K

0

Douglas

19.1

1968-06-20

3

43°41'N / 97°59'W

43°39'N / 97°47'W

9.90 Miles

2667 Yards

0

0

0K

0

Davison

20.2

1986-07-28

2

43°26'N / 98°23'W

1.90 Miles

80 Yards

0

0

250K

0

Douglas

20.3

1986-07-28

2

43°39'N / 98°43'W

43°39'N / 98°36'W

3.50 Miles

80 Yards

0

0

25K

0

Aurora

20.5

1969-06-25

2

43°24'N / 98°14'W

43°26'N / 98°22'W

6.60 Miles

200 Yards

0

2

25K

0

Douglas

22.8

1968-06-20

2

43°29'N / 98°51'W

43°36'N / 98°27'W

21.40 Miles

33 Yards

0

0

0K

0

Charles Mix

23.3

2003-06-24

3

44°01'N / 98°19'W

44°05'N / 98°16'W

5.00 Miles

500 Yards

0

0

500K

0

Sanborn

Brief Description: A tornado, crossing into Sanborn County from Jerauld County, destroyed or severely damaged several buildings on two farms. The tornado lifted the roof off a house. Another farmhouse had windows blown out, and shingles and aluminum siding torn off. Destroyed buildings included a barn, garage, outbuildings, and other small structures. Vehicles inside the destroyed garage were damaged. The tornado also caused tree, power line, and crop damage.

24.8

1998-05-30

2

43°46'N / 97°49'W

43°44'N / 97°43'W

6.00 Miles

200 Yards

0

0

50K

0

Hanson

Brief Description: A tornado damaged trees and power lines.

25.4

1962-05-14

3

44°30'N / 98°14'W

43°38'N / 98°01'W

60.70 Miles

1760 Yards

0

2

0K

0

Davison

26.2

1954-05-27

2

43°37'N / 97°47'W

43°38'N / 97°43'W

2.30 Miles

100 Yards

0

1

25K

0

Hanson

28.3

1992-06-16

2

43°59'N / 97°50'W

0.50 Mile

50 Yards

0

1

25K

0

Miner

28.7

1973-04-19

2

44°00'N / 97°54'W

44°12'N / 98°12'W

20.10 Miles

200 Yards

0

2

25K

0

Sanborn

30.3

1969-08-08

2

43°42'N / 98°00'W

43°38'N / 97°19'W

34.30 Miles

33 Yards

0

1

25K

0

Davison

31.5

2007-05-05

2

43°45'N / 97°38'W

43°51'N / 97°39'W

7.00 Miles

400 Yards

0

0

10K

0K

Hanson

Brief Description: EVENT NARRATIVE: A tornado caused damage to trees and a junk yard after crossing over from McCook County. EPISODE NARRATIVE: Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

32.2

1998-05-30

3

43°45'N / 97°41'W

43°43'N / 97°33'W

7.00 Miles

700 Yards

0

0

1.0M

100K

Hanson

Brief Description: A large and strengthening tornado destroyed buildings and other property on five farms and also destroyed trees and power lines before crossing the eastern edge of Hanson County.

32.6

2007-05-05

2

43°43'N / 97°36'W

43°46'N / 97°37'W

4.00 Miles

400 Yards

0

0

50K

0K

Mccook

Brief Description: EVENT NARRATIVE: A tornado damaged a house on the west side of Spencer and caused tree damage before crossing into western Hanson County. EPISODE NARRATIVE: Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

34.5

1986-07-28

2

43°47'N / 99°00'W

43°43'N / 98°54'W

6.00 Miles

80 Yards

0

0

250K

0

Brule

34.9

1971-06-04

2

43°23'N / 98°51'W

43°26'N / 98°47'W

4.30 Miles

137 Yards

0

0

25K

0

Charles Mix

35.0

1962-05-15

2

44°00'N / 97°42'W

44°04'N / 97°44'W

4.10 Miles

33 Yards

0

2

0K

0

Miner

36.0

1984-06-05

2

43°20'N / 97°46'W

0

0

25K

0

Hutchinson

36.4

1973-07-01

2

43°50'N / 97°33'W

0.50 Mile

67 Yards

0

1

25K

0

Mccook

36.6

1993-05-07

2

43°35'N / 97°33'W

2.00 Miles

75 Yards

0

0

500K

0

Hutchinson

Brief Description: A tornado carried a 60 X 120 foot metal pole barn into the tops of four grain bins causing extensive damage. The tornado also destroyed many small buildings and blew roofs off larger buildings on many farms in the area.

36.6

1993-05-07

2

43°35'N / 97°33'W

1.00 Mile

75 Yards

0

0

500K

0

Mccook

Brief Description: A tornado touched down on several farms destroying two pole barns, a grain bin, and a barn roof.

36.7

1998-05-30

4

43°45'N / 97°37'W

43°42'N / 97°26'W

7.00 Miles

1600 Yards

6

150

17.0M

400K

Mccook

Brief Description: The tornado from Hanson County destroyed most of Spencer as it strengthened and continued to grow. Most homes, other buildings, and other structures in Spencer were completely levelled. Debris and belongings were scattered over a large area, and one receipt blown from Spencer was found just west of Chandler, MN about 80 miles east of Spencer. The tornado killed 6 and injured 150 in Spencer. The tornado continued southeast from Spencer, widened, then weakened, and dissipated 4 miles southwest of Salem with another tornado then forming from the same storm. The tornado caused additional damage to trees, power lines, crops, and buildings on farms after moving southeast of Spencer. F70PH, F77PH, F93PH, F68PH, M62PH, F85PH

37.0

1973-07-01

2

43°50'N / 98°59'W

0.30 Mile

50 Yards

0

1

25K

0

Brule

40.0

2006-08-24

2

44°19'N / 98°10'W

44°15'N / 98°04'W

7.00 Miles

300 Yards

0

0

2.0M

0

Beadle

Brief Description: A tornado severely damaged 3 houses and destroyed or damaged a barn and several smaller buildings on farmsteads. The tornado knocked down power poles, with a transformer on one of the poles starting a brief fire. A tree shelter belt and crops were damaged. The amount of crop damage was not known.

40.3

1954-05-27

2

43°47'N / 97°33'W

43°51'N / 97°23'W

9.00 Miles

90 Yards

0

0

25K

0

Mccook

40.3

1965-05-08

2

43°57'N / 97°30'W

43°59'N / 97°34'W

3.30 Miles

243 Yards

0

0

25K

0

Miner

40.6

2007-05-05

2

44°04'N / 97°36'W

44°04'N / 97°37'W

1.00 Mile

100 Yards

0

0

20K

0K

Miner

Brief Description: EVENT NARRATIVE: A tornado damaged outbuildings and destroyed a hunting lodge. EPISODE NARRATIVE: Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

40.7

1971-07-03

2

44°14'N / 98°59'W

44°02'N / 98°41'W

20.10 Miles

30 Yards

0

0

0K

0

Hand

41.1

1965-06-28

2

43°13'N / 97°48'W

43°15'N / 97°45'W

2.30 Miles

73 Yards

0

0

0K

0

Hutchinson

41.9

1984-06-07

2

44°01'N / 97°32'W

0.10 Mile

60 Yards

0

0

250K

0

Miner

42.4

1998-05-30

2

43°42'N / 97°26'W

43°36'N / 97°24'W

6.00 Miles

700 Yards

0

0

900K

100K

Mccook

Brief Description: A tornado spawned by the same storm which produced the Spencer tornado damaged farms, crops, trees, and power lines in southern McCook County.

43.6

1962-05-16

2

44°10'N / 97°39'W

0

0

0K

0

Miner

43.8

2006-09-16

2

43°33'N / 97°30'W

43°42'N / 97°17'W

12.00 Miles

100 Yards

0

0

100K

0

Mccook

Brief Description: A tornado affected 3 farmsteads, destroying numerous outbuildings, damaging farm equipment and a home, killing at least 5 cattle and injuring others. The tornado also damaged a hog confinement building and overturned a semi trailer on Interstate 90.

44.0

1965-05-24

3

43°30'N / 97°30'W

43°34'N / 97°20'W

9.00 Miles

20 Yards

0

0

3K

0

Mccook

44.8

1959-05-25

2

44°15'N / 98°46'W

0

0

3K

0

Hand

45.3

1971-10-01

2

43°33'N / 97°23'W

0

0

25K

0

Mccook

46.4

2006-08-24

3

44°25'N / 98°41'W

44°19'N / 98°16'W

19.50 Miles

500 Yards

0

2

15.0M

0

Beadle

Brief Description: A tornado, entering Beadle County from Hand County to the west, destroyed 8 houses, damaged at least 7 other houses, and destroyed or damaged numerous farm buildings. One of the destroyed houses and several destroyed small buildings were on a farmstead 2 miles south of Wessington, and five large high voltage transmission towers were blown down about 3 miles southeast of Wessington. A woman was cut on the neck at one farm southwest of Wolsey where the house and all other buildings were destroyed; the injury was not life threatening. The tornado tossed a car and 2 pickups up to 50 feet at the same farm. Another non life threatening injury occurred southeast of Wolsey, again on a farm where the house and all buildings were destroyed. Several vehicles were destroyed or damaged. The tornado killed 10 head of cattle at one farmstead just south of Wolsey. The tornado snapped off numerous power poles, caused widespread tree damage, and severely damaged a bridge where it crossed U.S. Highway 14. The tornado also caused crop damage, but the amount of crop damage was not known. The tornado dissipated one and a half miles southwest of Huron.

46.4

2007-05-05

2

43°04'N / 97°54'W

43°07'N / 97°55'W

4.00 Miles

100 Yards

0

0

100K

0K

Bon Homme

Brief Description: EVENT NARRATIVE: A tornado damaged two farms, including a house shifted off its foundation, and several outbuildings destroyed. The tornado also caused widespread tree damage, including some trees debarked and uprooted. The tornado also blew off the tops of grain bins and blew down power lines. EPISODE NARRATIVE: Numerous thunderstorms during the afternoon and evening of May 5th produced large hail, damaging winds, several tornadoes, and flash flooding in southeast South Dakota. Significant damage was reported from several locations.

47.5

1965-06-26

3

42°58'N / 97°49'W

43°25'N / 97°28'W

35.60 Miles

163 Yards

0

0

250K

0

Bon Homme

47.9

2003-06-24

3

44°22'N / 98°02'W

44°24'N / 98°00'W

3.50 Miles

300 Yards

0

0

1.5M

0

Beadle

Brief Description: A tornado destroyed farm buildings and numerous trees, resulting in F3 damage southwest of Cavour. Homes and businesses within the town of Cavour were severely damaged (F2). Winds of 120 mph were measured by an anemometer on top of a grain elevator in Cavour.

48.1

1973-06-24

2

43°01'N / 98°18'W

1

1

25K

0

Charles Mix

48.1

1954-07-29

2

43°03'N / 98°20'W

42°59'N / 98°18'W

4.10 Miles

33 Yards

0

0

0K

0

Charles Mix

48.4

1992-06-16

3

44°05'N / 97°32'W

44°11'N / 97°26'W

3.00 Miles

73 Yards

0

0

2.5M

0

Miner

49.2

1972-07-19

2

44°22'N / 97°52'W

0.30 Mile

150 Yards

0

0

25K

0

Beadle

49.8

1971-07-03

2

44°13'N / 99°00'W

44°14'N / 98°56'W

2.30 Miles

100 Yards

0

0

25K

0

Hand

* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.